package exp4;

class A{
    String member = "fu";

    void show(){
        System.out.println(this.member);
    }
}

class B extends A{
    String member = "zi";

    void show(){
        System.out.println(this.member);
    }
}

public class PolymorphicDemo {
    public static void main(String[] args){
        A a = new B();
        a.show();
        System.out.println(a.member);
    }
}